Walter M. Klein, MD
Anatomic Pathology & Clinical Pathology Physician · Wynnewood, PA
Walter M. Klein, MD is an anatomic pathology & clinical pathology physician with a practice address in Wynnewood, Pennsylvania, and NPI 1326083833, issued on Jun 18, 2006. Check the license (Pennsylvania MD428595, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Walter M. Klein
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- MD428595 PA
Self-reported in NPPES; status is on the state search - Practice location
- 100 E Lancaster Ave, Wynnewood, PA 19096
- Phone
- (610) 645-2613
- Enumerated
- Jun 18, 2006
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20060816000047); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2000
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 716 in Pennsylvania → Look up another NPI →
Also registered at 100 E Lancaster Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicholas Abate, DOStudent in an Organized Health Care Education/Training Program1508568676
- John Abramson, M.D.Gastroenterology Physician1710953633
- Sandra Abramson, MDCardiovascular Disease Physician1275538282
- Olivia Ackley, MDInternal Medicine Physician1174453930
- Ashley Adams, CRNPWomen's Health Nurse Practitioner1497225635
- Bonnie Adelman, M.S.P.A.Audiologist1568718088
Verify Walter M. Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD428595Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $617.16
28 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 2,607 providers of this specialty with any payment received $3,565.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Main Line Pathology Associates, PCWynewood, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter M. Klein among 716 anatomic pathology & clinical pathology physician records in Pennsylvania
Walter M. Klein, MD is one of 716 anatomic pathology & clinical pathology physician records with a practice address in Pennsylvania. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 59% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2000 · median 2001 among the 388 with a school on file
- Record last updated2026 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in Pennsylvania
There are 716 anatomic pathology & clinical pathology physician records in Pennsylvania.
All 716 in Pennsylvania → Every provider in Wynnewood → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Pradeep Bhagat, M.D.Wynnewood, PA 190961639134935
- Robert Carr, M.D.Wynnewood, PA 190961811977523
- Susan Gisser, MDWynnewood, PA 190961164684767
- Edina Grujic, M.D.Wynnewood, PA 190961124008966
- Kimberly Heightchew, M.D.Wynnewood, PA 190961922072636
- Joseph Horstmann, M.D.Wynnewood, PA 190961366421588
- Shotaro Imaizumi, M.D.Wynnewood, PA 190961114906302
- James Paulson, M.D.Wynnewood, PA 190961790765410
Common questions
What is Walter M. Klein, MD's NPI number?
Walter M. Klein, MD's National Provider Identifier (NPI) is 1326083833, issued on Jun 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter M. Klein, MD located?
The NPPES record lists a practice address at 100 E Lancaster Ave, Wynnewood, PA, 19096. Phone: (610) 645-2613. Providers update this record themselves, so call before visiting.
How can I verify Walter M. Klein, MD's license?
NPPES lists Pennsylvania license number MD428595, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.